I'd put a round body tang in a 75 for a while. A small yellow or scopus, maybe a purple. You would not be able to keep it till full grown, but then again, not many can.

I really want a yellow tang! But I seen a post you were saying that it'll be okay until it's about full grown.. What could I do with it once it's grown cause this is my biggest tank.. And do you mean not many ppl can keep them alive that long? And should I stick with only 1 tang?

And idk if this will make a difference or not but this tank is in my tattoo shop and has a lot of ppl moving around it so I don't want any fish that would be stressed by this

Also thanks for the recommendation on the taotronic lights! They're awesome!

What I mean is, a full grown tang is a pretty large fish, and even in say- a 125, it's not going to fit very well. Imagine an 8" long tang with a round body in a 6' tank. I mean that there are not many people that have tanks in their homes that can house a full grown tang. Eventually most of those folks will have to find a larger home for it. A friend, a public aquarium, a larger tank...even tossing it back in the ocean if you live close enough to the ocean.
I wouldn't put too many tangs in a 75. One is enough IMO. I have a 4' tank as well. It's 24" front to back though, and I have 2 tangs right now that are pretty small. They won't be with me forever unless I substantially upgrade.

Okay that makes sense, my 75 is also 48"x24" but again I'm not an expert at this and don't want to risk hurting/killing a fish just cause I want more than 1.. So I will take your advice and stick with a juvenile yellow tang!
I'd also like a dwarf flame angel, is this possible with the tang?

And I figure I'll fill the rest with wrasse and smaller type fish.. Any favorites of yours that I could look into?